Pluto was named by Venetia Burney, an
11-year-old from England, while she
was having breakfast with her grandpa,
who was reading about the new planet
and wondered what it would be called.
Since she’d read about Greek and
Roman legends, she said ‘why not call
it Pluto?’ So Grandpa suggested it to an
astronomer at Oxford University, and
the rest is history. SourceSource 2